Mercurial > docs > master
annotate preface.roff @ 204:8c0d5bd92f0b
Added full names of abbreviations.
author | markus schnalke <meillo@marmaro.de> |
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date | Thu, 12 Jul 2012 09:42:56 +0200 |
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1 .H0 "Preface" no |
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23 | 3 .P |
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4 I have discovered the mail client \fInmh\fP |
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5 .[ |
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6 nmh website homepage |
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7 .] |
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8 in fall 2009. |
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9 At that time I used \fImutt\fP, |
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10 .[ |
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11 mutt website |
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12 .] |
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13 as many advanced Unix users do. |
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14 When I read about nmh, its concepts convinced me at once. |
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15 The transition from mutt to nmh was similar to beginning with |
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16 file management in the Unix shell when being used to the |
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17 \fImidnight commander\fP, |
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18 .[ |
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19 midnight commander website |
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20 .] |
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21 or like starting with vi when being used to modeless editors. |
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22 Such a change is not trivial, but, in being convinced by the |
31 | 23 concepts and by having done similar transitions for file management |
53
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24 and editing already, it was not too difficult. |
51 | 25 In contrast, setting up nmh to a convenient state became a tedious task |
23 | 26 that took several months. |
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27 Once having nmh arranged this way, I enjoyed using it |
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28 because of its conceptional elegance and its scripting capabilities. |
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29 Nevertheless, it was still inconvenient for handling attachments, |
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30 non-ASCII character encodings, and similar features of modern emailing. |
31 | 31 My setup demanded more and more additional configuration and helper scripts |
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32 to have nmh behave the way I wanted; yet my |
31 | 33 expectations were rather common for modern emailing. |
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34 As a computer scientist and programmer, I wanted to improve the situation. |
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35 .P |
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36 In spring 2010, I sent a message |
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37 .[ |
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38 nmh-workers gsoc |
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39 .] |
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40 to the \fInmh-workers\fP mailing list, |
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41 .[ |
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42 nmh-workers mailing list website |
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43 .] |
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44 asking for the possibility to offer a Google Summer of Code |
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45 .[ |
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46 google summer of code website |
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47 .] |
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48 project for me. |
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49 Participating in the development of nmh in this manner appeared attractive |
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50 to me, because I would have been able to work full time on nmh. |
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51 Although the nmh community had reacted generally positive to the suggestion, |
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52 the administrative work for such a project would had been too much. |
106
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53 Nonetheless, my proposal had activated the nmh community. |
31 | 54 In the following weeks, goals for nmh's future were discussed. |
55 In these discussions, I became involved in the | |
53
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56 question whether nmh should include mail transfer facilities. |
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57 .[ |
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58 nmh-workers thread mta mua |
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59 .] |
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60 I argued for the Mail Transfer Agent of nmh to be removed. |
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61 In this fundamental question, |
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62 my opinion differed from the opinion of most others. |
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63 Sadly, besides the discussions, hardly any real work was done. |
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64 Being unable to work on nmh in a way that would be accepted at university |
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65 as part of my studies, I needed to choose another project. |
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66 .P |
23 | 67 Half a year later, starting in August 2010, |
68 I took one semester off to travel through Latin America. | |
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69 During my time in Argentina, I wanted to work on free software. |
23 | 70 This brought me back to nmh. |
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71 Richard Sandelman, an active nmh user, took care of the official basis. |
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72 Juan Granda, an Argentine free software developer, |
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73 organized a computer with Internet connection. |
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74 Thanks to them, I was able to work on nmh during my three-month |
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75 stay in Santiago del Estero, Argentina. |
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76 Quickly it became obvious that I would not succeed with my main goal, |
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77 to improve the character encoding handling. |
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78 (One of its ramifications is the |
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79 missing transfer decoding of quoted text in replies.) |
23 | 80 As this is one of the most intricate parts of the system, the goal |
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81 was simply set too high. |
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82 Instead, I improved the code base as I read through it. |
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83 I found minor bugs for which I proposed fixes. |
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84 Additionally, I improved the documentation in minor ways. |
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85 When I started to work on larger code changes, |
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86 I had to discover that the community was reluctant to change. |
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87 Its wish for compatibility was much stronger than its |
31 | 88 wish for convenient out-of-the-box setups \(en in contrast to my opinion. |
106
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89 This, once again, led to long discussions. |
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90 I came to understand their point of view, but it was different to mine. |
23 | 91 At the end of my three-month project, I had become familiar with |
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92 nmh's code base and community, |
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93 I had improved the project in minor ways, |
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94 and I still was convinced that I wanted to continue to do so. |
23 | 95 .P |
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96 Another half year later, the end of my studies came within reach. |
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97 I needed to choose a topic for my master's thesis. |
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98 Without question, I wanted to work on nmh. |
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99 But not exactly on nmh, because I had accepted that its |
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100 community has different goals than I have. |
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101 Working on nmh would result in much discussion and, in consequence, |
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102 little progress. |
23 | 103 After careful thought, I decided to start an experimental version of nmh. |
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104 I wanted to implement my own ideas of how an MH-like system should |
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105 look like. |
31 | 106 I wanted to create a usable alternative version to be compared with |
107 the present state of nmh. | |
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108 Eventually, my work would be proven successful or not. |
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109 In any case, the nmh project would profit from my experiences. |
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110 |
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111 .U2 "Focus of this Document |
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112 .P |
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113 This document explains the design goals and implementation decisions |
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114 for mmh, |
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115 .[ |
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116 mmh website homepage |
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117 .] |
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118 an experimental version of nmh. |
31 | 119 It discusses technical, historical, social and philosophical considerations. |
120 On the technical side, this document | |
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121 explains how an existing project was streamlined by removing rough edges |
106
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122 and better exploitation of the central concepts. |
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123 On the historical side, changes through time are discussed, |
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124 regarding the use cases and the email features, |
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125 as well as the reactions to them. |
31 | 126 Socially, this document describes the effects |
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127 and experiences of a newcomer with revolutionary aims entering an old |
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128 and matured software project. |
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129 Philosophical thoughts on style, mainly based on the Unix |
53
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130 philosophy, are present throughout the discussions. |
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131 The document describes the changes to nmh, |
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132 but as well, it clarifies my personal perception of the |
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133 concepts of MH and Unix, and explain my therefrom resulting point of view. |
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134 .P |
31 | 135 This document is written for the community around MH-like mail systems, |
136 including developers and users. | |
106
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137 Despite the focus on MH-like systems, this document may be valuable |
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138 to anyone interested in the Unix philosophy and anyone in contact with |
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139 old software projects, be it code- or community-related. |
23 | 140 .P |
106
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141 The reader is expected to be familiar with Unix, C and emailing. |
53
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142 Good Unix shell knowledge is required, because MH relies fundamentally |
197
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143 on the shell. |
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144 Without the power of the shell, MH becomes a motorcycle |
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145 without winding roads: boring. |
181
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146 Introductions to Unix and its shell can be found in \fIThe UNIX Programming |
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147 Environment\fP by Kernighan and Pike |
37 | 148 .[ |
149 kernighan pike unix prog env | |
150 .] | |
181
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151 or \fIThe UNIX System\fP by Bourne. |
37 | 152 .[ |
153 bourne unix system | |
154 .] | |
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155 The reader is assumed to be a C programmer, |
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156 but the document should be understandable otherwise, too. |
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157 The definitive guide to C is Kernighan and Ritchie's |
181
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158 \fIThe C Programming Language\fP. |
37 | 159 .[ |
160 kernighan ritchie c prog lang | |
161 .] | |
164
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162 A book about system-level C programming, such as those written by |
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163 Rochkind and Curry, |
37 | 164 .[ |
165 rochkind advanced unix prog | |
166 .] | |
167 .[ | |
168 curry system prog | |
169 .] | |
164
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170 can be helpful as additional literature. |
106
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171 Old books are likely more helpful for understanding, |
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172 because large parts of the source code are old. |
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173 The reader is expected to know the format of email messages and |
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174 the structure of email transfer systems, at least on a basic level. |
197
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175 It's advisable to have cross-read RFC\|821 and RFC\|822. |
199 | 176 Furthermore, basic understanding of MIME [RFC\|2045\(enRFC\|2049] |
197
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177 is good to have. |
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178 The Wikipedia provides good introduction-level information about email. |
197
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179 .[ |
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180 wikipedia email |
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181 .] |
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182 .P |
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183 Frequent references to the Unix philosophy will be made. |
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184 Gancarz has tried to sum it up in his book |
181
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185 \fIThe UNIX Philosophy\fP. |
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186 .[ |
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187 gancarz unix phil |
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188 .] |
181
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189 Even better, though less concrete, are \fIThe UNIX Programming |
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190 Environment\fP |
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191 .[ |
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192 kernighan pike unix prog env |
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193 .] |
181
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194 and \fIThe Practice of Programming\fP |
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195 .[ |
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196 kernighan pike practice of prog |
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197 .] |
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198 by Kernighan and Pike. |
181
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199 The term paper \fIWhy the Unix Philosophy still matters\fP |
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200 .[ |
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201 why unix phil still matters schnalke |
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202 .] |
197
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203 by myself provides an overview on the philosophy, |
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204 including a case study of MH. |
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205 .P |
197
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206 Although a brief introduction to MH is provided in Section |
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207 .Cf mh , |
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208 the reader is encouraged to have a look at |
181
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209 \fIMH & nmh: Email for Users & Programmers\fP by Jerry Peek. |
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210 .[ |
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211 peek mh |
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212 .] |
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213 The current version is available freely on the Internet. |
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214 It is the definitive guide to MH and nmh. |
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215 .P |
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216 This document is neither a user's tutorial to mmh nor an introduction |
53
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217 to any of the topics covered. |
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218 The technical discussions are on an advanced level. |
52
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219 Nevertheless, as knowledge of the fundamental concepts is the most valuable |
51 | 220 information a user can acquire about some program or software system, |
52
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221 this document may be worth a read for non-developers as well. |
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222 |
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223 |
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224 .U2 "Organization |
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225 .P |
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226 This thesis consists of three chapters. |
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227 Chapter 1 introduces into the topic, describing MH and explaining |
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228 the background and goals of the mmh project. |
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229 Chapter 2 discusses the work done in the project. |
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230 It is organized along the three major goals of the project, namely |
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231 streamlining, modernizing, and styling. |
164
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232 Not every change is described because that would bore the reader. |
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233 Instead, important changes and those standing for a set of similar |
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234 changes are described and discussed. |
200 | 235 Chapter 3 finishes up by summarizing the achievements and taking |
164
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236 a look into the future of the mmh project. |
143
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237 .P |
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238 .I "Italic font |
197
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239 is used to emphasize new terms, and for names of software projects, |
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240 literature, and man pages. |
143
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241 .CW "Constant width font |
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242 is used to denote names of programs, files, |
200 | 243 functions, command lines, code excerpts, program input and output. |
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244 .P |
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245 References to man pages are printed as ``\c |
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246 .Mp cat (1)''. |
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247 In this case it is a reference to the man page of |
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248 .Pn cat , |
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249 which is in section one of the Unix manual. |
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250 Internet technologies are specified by \fIRequests for Comments\fP (RFCs). |
199 | 251 Throughout the document, they are referenced similar to ``RFC\|821''. |
143
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252 A list of relevant RFCs is located at the end of the document. |
200 | 253 Literature is cited in brackets, such as |
143
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254 .[ ``[ |
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255 kernighan pike unix programming env |
197
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256 .]]''. |
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257 Citations of email messages and websites are in the same style |
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258 but distinguished by a prefix. |
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259 For example: |
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260 .[ ``[ |
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261 website mmh |
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262 .]]'' |
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263 and |
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264 .[ ``[ |
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265 nmh-workers mmh announce |
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266 .]]''. |
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267 All references are collected at the end of the document. |
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268 .P |
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269 This document describes practical programming work. |
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270 The code of mmh is managed with the |
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271 .Pn git |
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272 version control system. |
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273 .[ |
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274 git website |
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275 .] |
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276 All code changes were checked in. |
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277 In the discussions, references to corresponding code changes are printed |
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278 as ``\c |
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279 .Ci 1a2b3c4 ''. |
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280 The identifier is the seven-letter-prefix of the changeset hash value, |
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281 which is considered unique. |
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282 A change can be looked up in the repository, on the command line with |
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283 .Cl "git show XXX" , |
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284 replacing `\f(CWXXX\fP' with the concrete hash value or any unique prefix. |
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285 In this example: |
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286 .Cl "git show 1a2b3c4" . |
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287 At the time of writing, changesets can be looked up online at: |
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288 .CW "http://git.marmaro.de/?p=mmh;a=commitdiff;h=XXX" . |
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289 But as we all know, URIs are always at risk to change. |
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290 .P |
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291 Whenever lines of code were determined, David A. Wheeler's \fIsloccount\fP |
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292 .[ |
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293 sloccount website |
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294 .] |
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295 was used to measure the amount in a comparable way. |
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296 |
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298 .U2 "Acknowledgments |
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300 To be written at the very end. |
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301 .P |
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302 FIXME |